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AVStream Driver Reference Information
70 ViewCast
With SimulStream enabled, there can be multiple capture pins and multiple preview pins.
Each capture and preview pin pair is on a separate filter. The maximum number of each type
of pin is the same as the maximum number of filters you have elected to expose in the
SimulStream control group. Any pin can produce video at any size, rate, color format, and
crop setting. Of course, practical limits are imposed by the bandwidth of the machine.
The following post-processing filters can be applied, with or without SimulStream enabled:
Motion adaptive deinterlacing and inverse telecine
Gamma correction
Logos
On-video caption rendering
Some of these filters operate globally on all filters and pins of a device, and some operate on a per-filter
or per-pin basis:
The Video Proc Amp controls – brightness, contrast, hue, saturation, and sharpness – are
applied globally in hardware to the incoming video.
The basic reference size – CCIR–601 or square pixel – is established in hardware. Horizontal
delay is also performed in hardware.
Deinterlace / inverse telecine and gamma correction are applied to all filters and pins on the
device and have the same settings for all filters and pins.
Crop, logo, and caption settings can be different for each pin of each filter, and the driver
maintains separate settings for each filter and pin.
Video size, color format, and frame rate can also be different for each pin. It is the
responsibility of the application to maintain these settings.